Question 16 2 pts A large high school in Northern Virginia encourages students to work either part-time or volunteer jobs to build people skills, teamwork, and self-esteem. The school claims that their students work on average 12 hours per week (either part-time or volunteer). A random sample of 45 students indicated that the students worked an average of 18 hours per week with a standard deviation of 2.5 hours per week. Which of the following tests is appropriate to establish that the school's estimate is too low? Q Chi-Square Goodness of Fit Test 0 Two-sample ttest for a difference in means 0 One-sample 2 test for proportions O One-sample t test for means Question 17 2 pts To test the effectiveness of a summer math review course, 15 students from a random sample were given a diagnostic assessment before beginning the program and a follow-up assessment after completing the program. For each student, the difference in the score points between the two assessments was calculated and used to create a 95% condence interval (18.93, 21.52) Assuming all conditions for inference are met, which of the following is a correct interpretation of the interval? 0 For all students in the program, 95 percent of the students will have a mean difference in scores of between 18.93 points and 21.52 points. 0 There is a 0.95 probability that the mean difference in scores for all students in the sample is between 18.93 points and 21.52 points. 0 We are 95% condent that the mean difference in scores for students in the sample is between 18.93 points and 21.52 points. 0 We are 95% condent that the mean difference in scores for all students in the program is between 18.93 points and 21.52 points. Question 18 2 pts A recent poll about social media sampled 2000 people and asked what is the most important factor when deciding whether to connect on social media with another person. The results are shown in the table: F A chisquare test is used to test the null hypothesis that gender and factor are independent. Which of the following statements is a correct decision about the null hypothesis? 0 Reject H0 at 0: : 0.05 but not at 0: : 0.01. O Reject H0 at 0: : 0.10 but not at 0: : 0.05 O Fail to reject H0 at a: = 0.10 O Reject H0 at oz : 0.01